Actually, it's not that you don't know that. In this life, no one is irreplaceable. But you're addicted to work and like to be recognized for your worth. You feel it's meaningless to spend time just hanging out, hanging out with friends and talking nonsense.
At the year-end party of the agency, everyone gathered to eat and drink enthusiastically, but you were alone in a corner, drinking quietly. He saw you were sad, and asked: Do you like the wine? You shook your head. He said: because your heart is always restless, your head is always moving, thinking about all kinds of things. Every time we sat drinking coffee, I saw you drinking without knowing what you were drinking, because you were so busy thinking about one thing after another, worrying about one job after another. Life is never over until death. Don't you know how to enjoy life, sometimes just a rare free moment enjoying a cup of tea or a cup of coffee is also happiness.
I remember the time I went to Bodh Gaya, one of the “four spiritual centers” of Buddhism in India, and drank milk tea in the Tibetan area. At first, I found it bland and tasteless. But a monk told me to calm down, drink it slowly and feel it. I listened and strangely, I felt that the cup of tea had its own taste, completely different from the beginning… Perhaps, many of us are living too fast without the necessary stops and breaks to live slowly.
You replied: Once you get into the cycle of making a living, it's hard to get out. You'll probably have to slow down when you retire.
He shook his head: It might be too late to regret then. Many people regret not living a meaningful life when they are old, but it is too late. Don't confront yourself, when you are hungry you have to eat, when you are thirsty you have to drink, when you are tired you have to rest. Now enjoy a glass of wine and the delicious food on the table, it will help you relax your nerves and find life more lovely.